templater: add parsing and expansion rules to process "templatealias" section
The debugtemplate command is updated to show expanded tree, but still the
template engine doesn't support alias expansion. That's why the test says
"parse error" for now.
#!/usr/bin/env python
# Filter output by pyflakes to control which warnings we check
from __future__ import absolute_import, print_function
import re
import sys
def makekey(typeandline):
"""
for sorting lines by: msgtype, path/to/file, lineno, message
typeandline is a sequence of a message type and the entire message line
the message line format is path/to/file:line: message
>>> makekey((3, 'example.py:36: any message'))
(3, 'example.py', 36, ' any message')
>>> makekey((7, 'path/to/file.py:68: dummy message'))
(7, 'path/to/file.py', 68, ' dummy message')
>>> makekey((2, 'fn:88: m')) > makekey((2, 'fn:9: m'))
True
"""
msgtype, line = typeandline
fname, line, message = line.split(":", 2)
# line as int for ordering 9 before 88
return msgtype, fname, int(line), message
lines = []
for line in sys.stdin:
# We whitelist tests (see more messages in pyflakes.messages)
pats = [
(r"imported but unused", None),
(r"local variable '.*' is assigned to but never used", None),
(r"unable to detect undefined names", None),
(r"undefined name '.*'",
r"undefined name '(WindowsError|memoryview)'")
]
for msgtype, (pat, excl) in enumerate(pats):
if re.search(pat, line) and (not excl or not re.search(excl, line)):
break # pattern matches
else:
continue # no pattern matched, next line
fn = line.split(':', 1)[0]
f = open(fn)
data = f.read()
f.close()
if 'no-' 'check-code' in data:
continue
lines.append((msgtype, line))
for msgtype, line in sorted(lines, key=makekey):
sys.stdout.write(line)
print()
# self test of "undefined name" detection for other than 'memoryview'
if False:
print(undefinedname)